Letter regarding air quality monitoring results, 111 Broadway, Feb 2002

NYC 9/11 Public Portal Document

+2123447012 7-931 P.08/13 F-052 104 East 25th Sheet New York New York 10010 wwwaac-enviro.com 212.353.8260 tax 212.353.8306

Octoi !r 9.2001

Mr. Ed ,nrard Oberst Ingalls++ & Snyder, LLC 61 Brc,,adway, 31'` floor New York, New York 10006

Re: 61 Broadway, 3114 Floor Air Monitoring

Dear lair. Ward. respond for air monitoring at the above ATC associates inc. (ATC) has been retained to ATC obsetvt d no visible accumulations of referenced site. Prior to collecting the air samples, to the collapse of the World Trade Center. dust ,l.cnd debris that can have been attributed advised that a minor "dusting" was observed Howe+rer, In our telephone conversation, ATC was ealohas, but windows. The was ported as to aring a few square wascti nt to a feworl anticipated tha t s an i insufficient was the was cleaned prior to C s arrival n site. It is reasoning behind the minor dusting reported. of the 1 oar space. Analytical results ATC i::ollected air samples from locations representative of sarn; ding, within the building to be show airborne fiber concentrations. at the time and datecentime er of air (<0.01 floc) by Phase par cubic less than the regulatory standard of 0.01 fibers set n ATC'a observation prior Contrast and the Microscopy sis f the me of actorysir montoring results it isATC's o )inion thathe area meets the to te~i ti g regulatory criteria for re-occupancy. contained hen in is based on the physical ATC Associates Inc. certifies the information collect.:d during the work. All areas inspe, Ions conducted by ATO and the air sample data were •tested by PCM. expiaination of thi information presented please If yoi.i have any questions or require additional do ni.it hesitate to call me at 212-363-8280 Sind=.~reiy,

i ,1øi& Benji:'imin M. Sallemi Seni-ar Project Manager ATC Associates inc_

Cc: : files

NYC-WTC 000105610